Pressure device for vulcanizing rubber vehicle-tires.



D. E, BOUIH.

PRESSURE DEVICE FOR VULCF-NEZING RUBBER VEHlOLE TIRES.

APPLICATION FiLUJ AUG-32.1918.

Patented Feb. 1S, 1918).

@WMZJ A TTORNEYS WITNESSES DANA IE. BOOTH, or TU SA, OKLAHOMA.

PRESSURE DEVICE FOR VULCAI WIZING RUBBER VEHICLE-TIRES.

Application filed August 12, 1918.

To all ohom it may concern:

Be it known that I, DANA E. Boo'rn, a citizen. of the United States, and a resident of Tulsa, in the county of Tulsa and State (of Oklahoma, have invented a new and Improved Pressure Device for Vulcanizing Rubber Vehicle-Tires, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of the same.

This invention particularly relates to pressure devices for vulcanizing rubber vehicle tires wherein the heat for vuleanizing is sup-' plied by a vulcanizer located w'itlili the tire.

The object of this invention is a flexible easilv detachable eters of tires andone in which the tire be placed and vulcanized without leamarks or ridges upon the surface of. the ti when; the same is removed.

Here-tofore'when the vulcanizin was located within the casing of t e tiregd:

vuloanizer which conformed to the inner curvation of the casing was placed therein and a tension bar provided with tension screws was arranged to bear against such vulcanizer. To hold the casing, the tensio'nbar and the vuleanizer together a tape was wound tightly around the casing and the tension bar and the tension screws were then adjusted to produce the requisite pressure of the windin tape upon the tire. It is obvious that t is method of attaching the tire to the vuleanizer required considerable time and adjustment to place the casing in operative position for vulcanization and also required considerable time to remove the tape wrapping when the process of vulcanization was completed. Furthermore, when the vulcanization'of the casing, wascompleted under tape pressure the sur-' face of the tire would hear a reproduction of the surface of the tape and each lap of the tape would be clearly visible; if the tape be too loose a ridge would appear and if too tight, a depression.

My device can be applied and adjusted and removedin much shorter time than the devices now n use, and when my device is removed the surface of the tire issmooth.

My invention comprises a body portion lu'nulur in form and shaped. to conform to the contour of a-pneumatic vehicle tir'e'or shoe. The tubular body is split'onljs under s ecification of Letters Patent.

producer pressure devicecapable of adaptability to all sizes or drum" the; jdrawin L" plished by adjustab Patented Feb. 18, 1919. Serial No. 249,452.

. it will fit any size or diameter of tire and produce uniform pressure upon the surfa ceto be vulcanized. Figure 1 represents a longitudinal section of my device in position;

Fig. 2 represents a cross section of the sa-I'ue on the lines 22 of Fig. l; and

ig. 3 represents a full view of my device. Referring to the drawings' my device comprises specifically a split tubular body I) of non-elastic material having a smooth inner surface shaped to conform to the contour of a pneumatic VLJ lClB tire or shoe and of such length as to co espond to the bearing surface of the usua vulcanizer, as par tioularly illustrated in Fig.1 which shows my pressure device in osltion relatively to thc ti'reor shoe 0 and lilac vulcanizer.

y device is adapted to be used in connection withan interior vulcanizer of ac cepted form, the best form being shown in p a m' Fig. 1, wherein the deviqe comprises a eating chamber f a steam inlet 9 and outlet 9", a tension bar A, set screws 15, and biqiv-dlf-tap j.

.Myipiessure device is adapted to embrace the tlre'to be vulcanized at those points where the vulcanizing means is located, and is deside for adjustment so that i signed to force the tire in tight contact with ..ithe*said vulcanizin means. This is aceom ls means such as the buttons a and 'lacings d located on the pressure device, the lacings being designed to pass over the tension bar it of the vulcanizer. As soon as the ressure device is laced in position the tension nuts may be moved so as to thoroughly compress'the tire against the vulcanizing means and thus it'formsa pressure device or mold embracing the tire to be vuleanized. y v

Owmgto the split. in the tubular body such be y is capable of considerable lateral expansion so that. the 'aws; formed on the two sides of the slit bdeiterided to Tembrace any diameter of tireanct'canbe forced tolconform to curvatuwofflm the by means When heat is a iedto the interior of the j tire andthe process of vulcanization proceeds e tire is in contact the outersui'faceofth ofthe'pressure dewith i, snitotth ;surface vice canizati on is completed the outer' surface of the tire is smooth and regular and isa vast improvement on the appearance of the sur- Zi, so that 'whenitheoperation of vulface of the tire when the usual method of wrapping tape around the tire and the tension bar 1s used.

I have found it convenient to construct the 1 body of my pressure device in laminated form .Whereln the outer layer 1 is composed of a llOIPelHStlc material or of overlapping met-a1 strip, a layer 2 of a heat resisting material such as asbestos, and a layer 3 of paper or easily compressible material as this construction is canable of maintaining its form and at the same time is flexible enough to conform. to the size or diameter of any tire.

\Vhut I claim is:

A pressure device for vulcanizing rubber pneumatic tires comprising a split tubular body of laminated construction adapted to embrace a vehicle tire, tie means for said body adapted to embrace a vulcanizer ele- Inentand place the device under tension.

DANA E. BOOTH. 

